Re: Tales of mc

[john o goyo]

Greetings, Gaius.

Thank you for the information below. (I actually tee'd the build output 
to see the build commands.)

I am able to translate and build simple modules using the empty 
m2/gm2-libs-min/SYSTEM.mod.  Trying to compile the SYSTEM in 
m2/gm2-libs-min/SYSTEM.mod led me to a question.  I know that mc is a 
boot-strapping tool that does not translate all of Modula-2. How much 
does it understand?

For example, gcc/m2/mc/README states that local modules and (most) 
aggregates are unsupported.  However, I found that SHIFT() is not known 
to it.

Sincerely,
john


On 2022-09-02 18:09, Gaius Mulley wrote:
> Hello John,
>
> sure, mc doesn't create a main function - it only translates modules
> into C/C++ modules.
> The main (scaffold) needs to be created and it will need to call each
> modulename_init and
> modulename_finish function in order.  This is accomplished by using
> another small program
> mklink which takes input a list of modules and creates a main with an
> ordered sequence of
> calls to the modulename_init / finish.  Here are the rules from
> gcc/m2/Make-lang.in which
> creates the main for mc itself.
>
> M2LINK=m2/boot-bin/mklink$(exeext)
>
> m2/boot-bin/mklink$(exeext): $(srcdir)/m2/tools-src/mklink.c
>          $(CXX) $(CFLAGS) -I$(srcdir)/m2 -Im2/gm2-libs-boot
> -Im2/gm2-compiler-boot -I$(srcdir)/m2/mc-boot-ch $(INCLUDES) $< -o $@
>
> m2/mc-boot/main.o: $(M2LINK) $(srcdir)/m2/init/mcinit
>          unset CC ; $(M2LINK) -s --langc++ --exit --name mainmcinit.c
> $(srcdir)/m2/init/mcinit
>          mv mainmcinit.c m2/mc-boot/main.c
>          $(CXX) -g -c -I. -I$(srcdir)/../include -I$(srcdir)
> $(INCLUDES) m2/mc-boot/main.c -o $@
>
>
> hope this helps,
> regards,
> Gaius
>
> On Fri, Sep 2, 2022 at 4:53 PM john o goyo <jog37@riddermarkfarm.ca> wrote:
> > Greetings.
> >
> > I now have a makefile that builds mc directly from the git repository as
> > pulled down.  Several header and source files are local as they were
> > generated during the build. Now, I need to know how the main() function
> > is created -- nothing in the help message seems to indicate how.
> >
> > Gaius, please assist.
> >
> > Sincerely,
> > john